Do all your kids do chores?
Yes my kids do chores. No they don't complain. They just do them because I'm terrifying and they know I'm in charge. If they whine? They get more chores and I will not let them rest until my bidding is complete.
Really though? I took my 10 least-favorite chores, broke them up into 5 sections, assigned the two easiest ones permanently to the 4 year old, and the other 4 pairs are assigned a fun name (because I'm fun, damnit) and the kids rotate through the weekly.
It works. By the time they're bored of their chore, it's time to do a new one. Every 3-4 months I mix them up and rename them something different. We've done Hogwarts houses, superheroes, famous feminists. Star Wars characters, teachers from their school (that was during the summer.... the kids did NOT appreciate being reminded of school, but I thought it was hilarious) and next I think I'm going to do grandparents... because there will be nothing funnier than my 7 year old going "I'm Papa Larry this week! Who are you? Oh, HI GRAMMY!!"
I'm nice and I shared my spreadsheet... it's super fun. I also created a "Jedi Training Academy" for kids who are struggling with staying on top of ongoing behavior issues and organizational tasks. It didn't work because I got bored but it's in the drive anyways.